How well do you know and TRUST the person wanting to rent it? Most mechanics won't loan or rent any of thier tools, because they know that either they won't come back at all, or they'll come back damaged and dirty.
I wonder if $10 is enough...the durn chair cost me about $400. On a good day a person can make quite a lot of money with the chair, like half the purchase price...I guess I'm not in favour of renting my chair...good luck if you decide to rent yours! mk